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        <section id="main"><article id="post-考研/SpringBoot的学习" class="article article-type-post" itemscope itemprop="blogPost">
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        <h2 id="SpringBoot的学习"><a href="#SpringBoot的学习" class="headerlink" title="SpringBoot的学习"></a>SpringBoot的学习</h2><h3 id="1-跨域请求"><a href="#1-跨域请求" class="headerlink" title="1. 跨域请求"></a>1. 跨域请求</h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br></pre></td><td class="code"><pre><span class="line"></span><br><span class="line">@Configuration</span><br><span class="line">public class MvcConfig implements WebMvcConfigurer &#123;</span><br><span class="line"></span><br><span class="line">    &#x2F;**</span><br><span class="line">     * 添加跨域</span><br><span class="line">     *&#x2F;</span><br><span class="line">    @Override</span><br><span class="line">    public void addCorsMappings(CorsRegistry registry) &#123;</span><br><span class="line">        registry.addMapping(&quot;&#x2F;*&quot;)</span><br><span class="line">                .allowCredentials(true)</span><br><span class="line">                .allowedHeaders(&quot;*&quot;)</span><br><span class="line">                .allowedMethods(&quot;*&quot;)</span><br><span class="line">                .allowedOrigins(&quot;*&quot;);</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

<h3 id="2-配置FastJson"><a href="#2-配置FastJson" class="headerlink" title="2. 配置FastJson"></a>2. 配置FastJson</h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br></pre></td><td class="code"><pre><span class="line">&#x2F;**</span><br><span class="line">  * 配置fastJson策略</span><br><span class="line">  *&#x2F;</span><br><span class="line"> @Override</span><br><span class="line"> public void configureMessageConverters(List&lt;HttpMessageConverter&lt;?&gt;&gt; converters) &#123;</span><br><span class="line">     FastJsonHttpMessageConverter converter &#x3D; new FastJsonHttpMessageConverter();</span><br><span class="line">     FastJsonConfig config &#x3D; new FastJsonConfig();</span><br><span class="line">     config.setSerializerFeatures(SerializerFeature.DisableCircularReferenceDetect,</span><br><span class="line">             SerializerFeature.WriteMapNullValue);</span><br><span class="line">     converter.setFastJsonConfig(config);</span><br><span class="line">     converters.add(converter);</span><br><span class="line"> &#125;</span><br></pre></td></tr></table></figure>

<h3 id="3-可以将网站的访问记录放入数据库中，通过SpringMvc拦截器实现"><a href="#3-可以将网站的访问记录放入数据库中，通过SpringMvc拦截器实现" class="headerlink" title="3. 可以将网站的访问记录放入数据库中，通过SpringMvc拦截器实现"></a>3. 可以将网站的访问记录放入数据库中，通过SpringMvc拦截器实现</h3><h3 id="4-添加或重定向静态资源的访问路径，配置前的原路径仍可访问"><a href="#4-添加或重定向静态资源的访问路径，配置前的原路径仍可访问" class="headerlink" title="4. 添加或重定向静态资源的访问路径，配置前的原路径仍可访问"></a>4. 添加或重定向静态资源的访问路径，配置前的原路径仍可访问</h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">@Override</span><br><span class="line">public void addResourceHandlers(ResourceHandlerRegistry registry) &#123;</span><br><span class="line">    registry.addResourceHandler(&quot;&#x2F;good&#x2F;**&quot;).addResourceLocations(&quot;classpath:&#x2F;static&#x2F;&quot;);</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

<h3 id="5-Servlet的自动装配"><a href="#5-Servlet的自动装配" class="headerlink" title="5. Servlet的自动装配"></a>5. Servlet的自动装配</h3><ol>
<li><p>方法一</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br></pre></td><td class="code"><pre><span class="line">@Bean</span><br><span class="line">public ServletRegistrationBean test () &#123;</span><br><span class="line">    return new ServletRegistrationBean(new TestServlet(),&quot;&#x2F;test&quot;);</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>



</li>
</ol>
<ol start="2">
<li><p>方法二</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br></pre></td><td class="code"><pre><span class="line">@Configuration</span><br><span class="line">@ServletComponentScan(&quot;com.originit&quot;)</span><br><span class="line">public Class ServletConfig &#123;&#125;</span><br><span class="line"></span><br><span class="line">@WebServlet(urlPatterns &#x3D; &quot;&#x2F;test&quot;)</span><br><span class="line">public class TestServlet extends HttpServlet &#123;</span><br><span class="line"></span><br><span class="line">    @Override</span><br><span class="line">    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException &#123;</span><br><span class="line">        resp.getWriter().println(&quot;ca&quot;);</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>



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<h3 id="6-文件上传"><a href="#6-文件上传" class="headerlink" title="6. 文件上传"></a>6. 文件上传</h3><p><img src="C:\Users\xxc、\AppData\Roaming\Typora\typora-user-images\image-20200211163259119.png" alt="image-20200211163259119"></p>

      
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